#include <stdio.h>
#define A 1000

int main()
{

    printf("Hello :%d\n",A);
    //注释
    //注释
    //注释
    //注释
    //注释
    //注释
#ifdef N
    printf("N\n");
#else
    printf("No N\n");
#endif

    return 0;
}
